What are the benefits of EGR delete on 6.7 Cummins?

If you own a Dodge Ram 2500 or 3500 with the 6.7 Cummins engine, you may have considered upgrading your truck's performance by deleting the EGR system. But what exactly does that mean—and more importantly, what are the real benefits?

This article breaks down everything you need to know about performing an EGR delete on your 6.7 Cummins engine, covering performance, maintenance, and long-term reliability. We’ll also help you understand how this modification aligns with your driving needs—whether you're towing, off-roading, or just looking for a cleaner, more efficient engine.

What is an EGR Delete?

EGR stands for Exhaust Gas Recirculation. The system is designed to reduce nitrogen oxide (NOx) emissions by redirecting a portion of exhaust gases back into the combustion chamber.

While this helps meet emission standards, it also has downsides, particularly for diesel engines like the 6.7L Cummins. Over time, the EGR system can cause carbon buildup, reduce performance, and increase engine wear.

An EGR delete kit removes or bypasses the EGR system entirely, preventing exhaust gases from re-entering the engine. It is a popular upgrade among diesel owners who want to increase performance, improve engine longevity, and reduce costly repairs.

🔧 Interested in a complete upgrade? Check out our 6.7L Cummins EGR Delete Kit for premium materials and precision fit.

What are the benefits of EGR delete on 6.7 Cummins?

The 6.7L Cummins turbo-diesel engine is well-known for its reliability, torque-rich output, and workhorse capability in heavy-duty trucks. However, emissions regulations have introduced components like the Exhaust Gas Recirculation (EGR) system that can compromise these strengths. As a result, many diesel owners consider installing an EGR delete kit—an aftermarket modification that removes or disables the EGR system. Below, we examine the key advantages of this modification, backed by technical insight and practical experience.

1. Enhanced Engine Performance

The EGR system routes a portion of exhaust gases back into the combustion chamber to reduce nitrogen oxide (NOx) emissions. While this helps meet environmental standards, it also dilutes the air-fuel mixture, which can negatively impact performance:

• Reduced Power Output: Recycled exhaust gases lower combustion efficiency, diminishing horsepower and torque.

• Turbo Lag: EGR interference with airflow delays turbo spool-up, resulting in sluggish throttle response.

By removing the EGR system, the engine is supplied with cleaner, oxygen-rich air. Many users report gains of 15–25% in both horsepower and torque, along with quicker throttle response. These improvements are especially valuable in applications like towing, off-roading, or heavy hauling where immediate power delivery is essential.

2. Lower Maintenance Costs

EGR systems are notorious for reliability issues and can be expensive to maintain or repair:

• Carbon Buildup: Soot from recirculated exhaust accumulates in the intake manifold, valves, and EGR cooler, restricting airflow and reducing engine efficiency.

• EGR Cooler Failures: These components frequently crack due to extreme thermal cycling, with repair costs often exceeding $1,500, including labor.

By removing the EGR system, you eliminate these potential failure points. As a result, you’ll reduce the frequency and cost of:

• Intake manifold cleanings

• EGR cooler replacements

• Sensor-related issues (e.g., differential pressure sensors)

3. Improved Fuel Efficiency

EGR operation can lead to reduced fuel economy in the 6.7L Cummins engine due to:

• Incomplete Combustion: The diluted air-fuel mixture requires more fuel to maintain performance levels.

• DPF Regeneration Cycles: When paired with a Diesel Particulate Filter (DPF), the EGR system prompts fuel-consuming regeneration cycles to burn off soot.

After an EGR and DPF delete, many drivers see a 10–15% improvement in MPG. This fuel savings is especially beneficial for long-haul truck drivers or fleet operators where operational efficiency matters most.

4. Extended Engine Longevity

The EGR system contributes to several long-term issues that can shorten engine lifespan:

• Corrosion: Recirculated exhaust gases contain moisture, which promotes rust in the intake and other internal components.

• Oil Contamination: Soot particles mix with engine oil, degrading its lubrication properties and increasing internal wear.

Eliminating the EGR system improves engine longevity by:

• Maintaining cleaner engine oil for extended change intervals

• Reducing abrasive contaminants in critical moving parts

• Minimizing thermal stress on pistons, heads, and gaskets

5. Better Heat Management and Reliability

One of the lesser-known effects of the EGR system is increased engine heat. Excess heat can:

• Warp cylinder heads

• Deteriorate seals and gaskets

• Overload the vehicle’s cooling system

With the EGR system removed, under-hood temperatures drop significantly. This improves engine reliability in extreme conditions—such as towing heavy loads on steep grades in summer—and reduces strain on related components like radiators and intercoolers.

6. Unlocks Custom Tuning Potential

An EGR delete also opens the door to advanced tuning and performance upgrades:

• ECU Remapping: With fewer emissions constraints, the engine control unit (ECU) can be recalibrated for optimal fuel delivery, turbo boost, and shift points.

• Aftermarket Mods: Deleting the EGR system makes it easier to install other performance upgrades such as high-flow intakes, upgraded injectors, or larger turbos.

Custom tuning not only maximizes the performance potential of your 6.7 Cummins but also allows you to tailor the truck to your specific needs, whether it's hauling, racing, or general heavy-duty use.

Top Benefits of DynoVox EGR Delete on a 6.7L Cummins

1. Improved Engine Performance

When the EGR system is removed, the engine receives clean, fresh air only. This results in a more complete combustion process, improving power output, throttle response, and overall performance.

In many cases, Cummins owners report a horsepower gain of 10–20 HP after a full EGR and DPF delete combined with tuning.

2. Lower Exhaust Gas Temperatures (EGTs)

High EGTs can cause long-term damage to engine components, especially under heavy load. An EGR delete reduces the recirculation of hot exhaust gases, resulting in significantly lower EGTs. This is a critical advantage for towing, hill climbs, or long-distance hauling.

3. Extended Engine Life

The EGR system introduces carbon-rich exhaust back into the intake manifold, leading to soot buildup that clogs the system and restricts airflow. Over time, this can damage the turbo, intake valves, and even the pistons.

By eliminating this source of contamination, an EGR delete protects the engine from premature wear, extending its lifespan and reliability.

4. Better Fuel Economy

After an EGR delete, many drivers experience a 1–3 MPG improvement in fuel efficiency. Without the EGR system interfering with combustion, the engine burns fuel more efficiently. Over time, this can lead to substantial fuel savings—especially for high-mileage users.

5. Reduced Maintenance Costs

A faulty EGR valve, cooler, or sensor can trigger costly repairs, including check engine lights and limp mode. An EGR delete eliminates these failure points, helping you avoid unexpected breakdowns and shop visits.

Pair your EGR delete with a DPF Delete Kit with Muffler to maximize reliability and minimize future emissions-related issues.

Who Should Consider an EGR Delete?

An EGR delete is especially valuable for:

• Towing and Hauling: Lower EGTs reduce engine strain and improve long-term reliability.

• Off-Road Builds: Gain raw power and efficiency for mud, trails, or race applications.

• Fleet Owners: Reduce downtime and maintenance costs over the life of each vehicle.

• Long-Haul Drivers: Minimize fuel consumption and extend service intervals.

If you're combining performance mods like cold air intakes, intercoolers, or exhaust upgrades, deleting the EGR system unlocks your Cummins engine's full potential.

Final Thoughts

For 6.7L Cummins owners seeking more power, better fuel economy, and fewer maintenance headaches, deleting the EGR system offers undeniable benefits. It’s one of the most impactful upgrades you can make—especially when paired with a DPF delete and custom tuning.

Ready to give your truck the performance it deserves? Explore our complete EGR & DPF Delete Kits for 6.7L Cummins and make your next drive smoother, stronger, and more efficient.

Frequently Asked Questions

Is EGR Delete Legal?

EGR deletes are intended for off-road or race use only. Deleting emissions systems on a street-driven vehicle is not legal in emissions-controlled areas. Always check local laws and regulations before modifying your emissions system.

Can You Drive a 6.7 Cummins Without an EGR System?

Yes, when properly deleted and tuned, your 6.7L Cummins will run cleaner, cooler, and more efficiently without the EGR system. Just be aware that proper ECU tuning is essential to avoid error codes or limp mode.

We recommend pairing your delete kit with EZ LYNK Auto Agent 3 or compatible ECM tuning software to recalibrate your truck after installation.

Will This Void My Warranty?

Modifying your emissions system may void your powertrain warranty. It's essential to consult your warranty agreement or dealer before making permanent changes to your truck.